FROM TH2F
constant
0.031499813940667615+-0.016269736260929264
chi2/ndof = 0.012093705594825437
plane
0.07437388869164242+-0.1251434771439848
invpt slope = 0.005933183236359085+-0.007192493656127854
theta slope = -0.0516812537143105+-0.10411918713355196
chi2/ndof = 0.003634555816304967
from tgraph2D
constant
0.04188672590138399+-0.0019892778486053316
chi2/ndof = 0.0004906960686054515
plane
0.10337801648571165+-0.007419379877549457
invpt slope = 0.005774304475075187+-0.0005083323160506168
theta slope = -0.07444978204542503+-0.00640575139580062
chi2/ndof = 0.00015978564211398543